Pipe threading machine



Oct 4, 19320 E. L. AHERN PIPE THHEADING MACHINE Filed Dec. 4, 1930 3 Sheets-Sheet l INVENTUR 5.1.. flherrz BY @VW ATTORN EY-J Oct. 4, 1932. E. L. AHERN 1,881,111

PIPE THREADING MACHINE Filed Dec. 4, 1930 s Sheets-Sheet 2 Oct. 4, 1932. AHERN 1,881,111

PIPE THREADING MACHINE Filed Dec. 4, 1930 3 Sheets-Sheet 3 g9 Q n z; 9 Z6 Z8 2- w 1 59 \f/ r Z8 f 87 8 ATTORNEYd I i guano-S ATES PATENT OFFICE EDMUND'L. AHERN, or BATTLE CREEK, MICHIGAN PI PE rnnnnnme MACHINE q I i Application filed December 4, 1930. Serial No. 500,067.

invention relates to improvements in pipe threading machines, and it consists in the combinations, constructions, and arrangements herein described and claimed. "31, in object of my invention is to provide a pipe threading machine which is adapted for cutting a pipe in-sections and threading'the ends thereof. V

A further object of my invention to provide a pipe threading flnachine which .is

adapted for cutting a pipe and threading the ends of the cut sections thereof without re- 1 moving either of the pipe sections from the machine.

1e A further object of my invention isto provide a pipe threading machine in which nipples may be threaded Without the use of a' nipple chuck. IA further objectof my invention is to provide a pipe threading machine which will cutthreads of various depths. r A further object of my invention is to provide a pipe threading machine in which a pipe may be cutintosections, the-cut ends of g saidflsections being threaded and reamed withoutremovingthesections from the machi Other objects andadvantageswill appear OE in the following.specification,and the novel pointed out in the appended claims. 'My'invention is illustrated in theaccompanying drawings forming part of this vap- WE plication, in which 7 p i b Figure 1 is a front elevation of my device having parts thereof shown in section, Figure 2 is a longitudinal sectional view of a portion ofmy devicei showing the dies and the structureby which they are actuated, q f Figure 8 is-asectiontaken along the line 33 of Figure '2, Figure 4: is an endelevationof the housing shown in Figure 2 in which the pipe cutting structure is shown in elevation, the supporting. table being shown" in section, I Figurebis an end elevation of the structure shown in Figure 2'for regulating the depth ofcut of the dies, p

Figure'G is an end elevation of thestrucfeaturesofthe invention will be particularly ture shown in Figure 1 showing the'vise construction for holding the pipe,

Figure 7 is an elevation of a portion of the structure shown in Figure 4 for showing the I learner in attached position Figure 8 is a plan view of the reamer in attached position, and

Figure 9 is perspective detail view of portions of the device.

table or supporting member 1 which is substantially 'U-shaped'in cross section and is provided with supporting portions 2 and 3.

Supporting portion 3 is in the nature of a housing. Gears are engaged in the housing Q for the purpose hereinafter described. The supporting member 1 is provided with outwardly extending flanges or track portions 4. A pair of spaced-apart vise members 5 and 6 are disposed on the supporting member 1.

Each of said vise members comprises a frame 7 having side portions 8 and 9 and a top portion 10. The side portions 8 and 9 are provided with recesses 11 for receiving the flange portions 4 whereby the vise frame 7 In carrying out my invention, I provide a may ride on the flanges 4 and be restricted to a'horizo'ntal movement.

Longitudinallyr extending rails 12 are mounted on the inner side of the side portions of the supporting member '1 and are connected therewith in any desirable manner such as by bolts 13. The rails 12 are rovided with rack teeth 14:. A shaft 15 extends through the'vise frame 7 and mounted thereon are gears 16 in mesh with the rack teeth 14 of the rails '12. The shaft 15 extends through the vise frame 7 and is rovided with a manually actuated wheel 1* fixedly connected therewith whereby the gears 16 may be rotated. Thus it will beseen that when the wheel 17 is rotated, the vise frame 7 will be moved along the supporting frame 7 1; The side 9 of the vise frame 7 is provided with" an extending portion 18 to which is movably connected, a locking member 19 having a handle 20. The locking member 19 is adapted for engaging a side of the supporting member 1 whereby the vise frame'may be locked in position; The vise frame 7 is provided with a pair of gripping members 21 and .22 disposed one above other and 1 .adapted for vertical movement towardor away from each other. A manually actuated wheel 231s prov1dejd and is connected W1th the gripping members 21 and 22 by any means not shown since the same is old in the art whereby the gripping members 21 V and 22' may be moved; toward onaway from each I other. Itwill readily be seen that the gripping members 21 and 22 are adapted for re ceiving pipes ofvarious diametersv therebe- "tween and it will be noted that regardless of the diameters ofthe pipes held between the gripping members 21 and 22, the center will remain constant. rhecuaer and die mechanism'is disposed between the vise members 5 and 6 and comprises a car'irage 24 having a base portion25 and a superimposed. portion 26 secured to the baseportion 25by any desirable' means such aslbolts 27.

. LThe base portion 25 is provided with flange portions 28 havingrecesses 28; thereinfor. receiving theilange portions 4 of ,th-esupporting frame 1. @ne of the fiangesl28 is providedavith.rack-teeth-29- on it slower side thereof I gear wheelBO isrotatably-mount ed on the exte'rior side eta side of-the sup' porting: table and mesheswith thefra ck teeth 29 'A manually. actuated wheel 31-is fixedly connectedwiththe gear Wheel 30 whereby said gear wheel may be rotated for moving the carriage 24 longitudinally respect to thesupportingframe 1. The carriage 24 isiprovided with a cylindricalI'opening 32 therein in which isdisposed acylindfrical casing or hollow cylinder 33 havingan end 34 of reduced diameter. The cylindrical casing 33 is composed of twofsections;;namely;,35

and 36.: Each side of the'sectionflfiis provided with a tongue-portion, 37 receivable 1n a coresponding groove portion 38 of the secytion 35. The inner surface; of the carriage 24 is 'prov1dedw1t h a circumferent al recess I 39. The casing 33 isprovidediwith afcircumcessr39 and provided with.peripheralteethferentialfiange 401 extending within the re- 4l; 1 'A' diestock 42 isdisposed withinthe cylindrical' casing 3-3and isprovided with pro- I ]ect1ng flanges 43 recelvable n recesses 44.; of the, cylindrlcalcasing 33'wherebythec lindrical casiagss' and the 1 die stock 44 are lo'ck'ed'togetherfas a unit lheidie stock42 and'the end 3401 meanings 33 are respec tiyely provided-with cylindrical aligned openings 45 and 46 GXtQIldlIlg Y therethrough, said, openlngs being of suliicient s ze? torreceiyingapipe having. a relatively large diameter;.,;The die stock'42is provided with radiallyextending openings 47 in which are the'diesfmay; he heldiagamst' d (i5 disposeddies .48. They dies l48'fare provided with slots 49"therein for receiving spring 1 members 50. which areattached'in anyde smut, manner to the 7 die stock 421Wl1g1'eby I fsplacement .Whenthe (ll eirg popk 421 rgtaitedi I:

A stationary plate 51 is transversely posi tioned in a vertical plane with respect to the supporting member 1. The plate5l is provided with side portions 52 which are-secured to-the sides of the member 1 on the inner sides thereof by any desirable means such as bolts The plate; 51 is provided W 1;.- 1 ti e 'y .i eecir ul r op n 54 therethrough. A ring-plate 55 is secured to the plate 51 by any desirable im eansfsuch as bolts 56. Theringplate 55 is provided with a circular opening 57 thereth'rough of sub- "stantially th'e' same diameter as the opening openings corresponding to the numberof dies -48fand in radial alignment therewith,

each of the dies 48having a rounded-end48" extending within. its respective opening 60.

The ring. member 59 is provided with I a plurality 1 .openings161therethroughi equal in number to theopenings 60 inthefdie stock 42 andfin alignment-therewith. Each pair of aligned openings 60 and 61"are provided withapair of pin members 62 and 63 eXtending therethr'oughQ The pinzmemberl62 has one end fixedly connected with thering'member 59 by anydesi'rable means such as bolts 64. The opposite end ofthepin62 mayor may notsbe fixedly," connected with the die stock 4-2. The pins 62fand'63 have beveled.

abuttingfaces 65' and 66,;respiectively. The

abutting face of the :63 is provided with a tongue. portion 67 asshown-in Figure!) re- "ceivablein-[a' groove 68in theface of the pin 62; A portion 'ofthe. opposite face 69 of the pin 63 has oppositelybeveled, portions 70 and 71; meeting"atthe apex '72n The end portion of the pin 63 extending through the ring member 59 is provided'with serrations as shewnat'Za The opposite end oi thepin 63 is provided with a-p'roi ecting portion" 74. T Ai ing-plate 7 5 'is fixedly connected to the rotatablering member 59;.by any suitable means such as bolts 76'. The' ring-plate75 isprovided with acir'cimqferential recess 7G for recelv ng'an adgusting ring 77 prov ded with"circumferential- "serrations 7 8' in mesh ring plate 75 and the ring m mber: 591 are provided with a cvlindrical opening 9 therethrough. It will be noted that the vise mem- I here 5" and 6, the casing33 and the openings therethrough; the diestock 42 and the opening 45 therethrough, andthe ring member 59, the ring plate 7 5, together with the cylin v drical opening 7 9 extending therethrough,

are in axial alignment. AsshowninFigure 2,,the die members 48 engage and ride on the beveled 'surfaces 71'oi the pin members no a i 63. Spring members 80 are connected with the sides of the die stock 42 by any suitable means not shown and extend within the openings 60 engaging the faces 71 of the pins 63 on which'they ride. A shaft 81 is disposed within the supporting member 1. The shaft has one end 82 slidably and rotatably mounted in a bearing member 83 connected with the supporting member and the other end 84 rotatably mounted'in a projecting portion. 85 of the carriage 24. A gear 86 is fixedly mounted on the shaft 81 and extends through an opening 87 shown in dotted line position in Figure 3. The gear 86 is in mesh with theteeth 41of the casing 33 whereby said'casing may be rotated within the carriage 24.

Since the die stock 42 is fixedly mounted withinxthe casing 33, the casing 33, thedie stock 42 and the dies .48 carried thereby, to-

' gether' with thepins 62 and63, the ring member 59, vthe ring plate 75 and the adjusting ring 77, will be rotated as a unit by the gear A pair of housings 88 and 89 are mounted on the exterior of the: end 34'of the casing by any suitable means'such as bolts 90.

. The housings 88 and89 are oppositely positioned with respect to the opening 46. The housing 88 is provided with aforked bearlng member 91 which extends without the housing and is adapted for being moved radially with respect to the casing 33 by means of a manually actuated wheel 92. The housing 82 is provided with a cutting member 93 which is likewise mounted in thehousing 89 and is also adapted for being moved radially with respect to the casing 33 by means of a wheel 94. 'The construction of the housings 88 and 89 and their associated mechanisms is not shown since the same is old intheart and other types of such mechanisms might be utilized without departing from the spirit of my invention.

As shown in Figure4 the end34 ofthe section 36 which, togetherwith the section 35, comprises the casing 33 is provided with lug portions 95 receivable in recesses 96 of the section 35. Di'ametrically opposed projecting members 97 areconnected with the end 34 of the section 36 on opposite sides of the opening 46 for a, purpose hereinafter described. As shownjin Figure 1 a gear 98 is rigidly mounted thereon and is in mesh with a gear 99Tmounted on a shaft 100 which in turn is rotatably mounted in the supporting portion 3 of the supporting member- 1. The 7 gear 99 is connected by atrain of gears to a motor 101. Thegears disposed in the housing support-3 function as a transmission and may be shifted by any desirable means i not shown for varying the speed ratio of the gear98 with respect to the motor shaft 102. a From the foregoing let us assume that it is'desired' that apiece of pipe becut atany intermediate points and that the cut end portions be threaded. A'pipe 103 shown in dotted line position in Figure 1 is inserted through theopening 46, the stock opening 45, and the opening 79. By-moving the handles 20'upwardly and rotating the wheels 17, the vises 5 and 6 may be moved on the supporting table 1 until they are in the proper position for supporting thepipe. The wheels 23 of the visesare then rotated until the gripping members 21 and 22 engage and hold the pipe. Before the pipe is put in the machine it is first marked where'it is desired to be out. lVhen the pipe is put in the vises,

the mark is positioned in the vicinity of the cutter 93. When the pipe has been locked in the gripping members 21 and 22, the wheel 17 of. the vise 5 may then be-iotated for bringing the mark on the pipe in the path of the cutter 93, at which time the handles 20 of the locking members on both the vises 5 and 6 are moved downwardly for locking the vises in position. The bearing member 91 is then moved in engagement with the pipe so thatthe pipe will not buckle while being cut. The gears in the housing support 3 are then shifted by any means not shown for rotating the shaft 81 at the proper speed whereby the casing 33 may be rotated by which means the cutter 93 rotates about the pipe for cutting the same; After the pipe 1 7 line with the apices of the pin members 63.

The vises 5 and6 are again locked to the supportil'ig member.

The shaft 81 is again set in motion for rotating the casing 33. The wheel 31 shown in Figure 1 is then rotated in a counterclockwise direction for moving the carriage'24 in the direction of the arrow 105 at which time the die stock 42 as shown in Figure2 moves along the pins 62 and 63. Asthe die stock moves along the pins'62 and 63,"the dies 48, by reason of their travelling along the beveled surfaces 71 of the pin 63, are moved travels along the pins inthe direction of the arrow 105 until the dies 48' reach the apices 72 of the pins 63, at which time they have reached the peak of their in'ward movement inwardly for threading the pipe and con- 'tinue moving inwardly as the die stock 42 pins63. Until the dies move out of engage:

ment with the pipeythe rotation of. the shaft "'81 isstopped. The springs connectedwith of the diesserve to hold the dies48' in the-stock 42. and receivablein the recesses l9 g pos1. tive engagement with the beveled surfaces and 71 of the pins 68. The springs con-. nectedwith the stock member 42- and riding v on the beveledlsurfaces of the pins 63 are provided for; keeping. the beveled surfaces free fromthe cuttings so that the dies will not ride, over the cuttings and thereb'y'make an irregular cut. It will readily be seen that itis only necessary that the wheel .31 be rotated for moving the carriage 26 until the dies engage with the pipe as the dies in. out ting the pipe will; carry the carriagealo'ng until they have completed the threadlng of the pipe and move out of engagement there- After the pipes have been threaded the shaft 81 has ceased rotating, the vise lock 19 I is then moved, out of engagement with the supporting member 1 and. the vises moved f away fromeach other sothat the ends ofthe pipe cannot "come in contact with the dies regardless of the position of the carriage 26. The fcutting'and threading of a p'ipe'leaves.

aburon theend thereof which is not desira ble. To cut away this bur I provide a double,

" faced reanierilOfi. comprising a platelO'Z having openings'therein for receiving the threaded projections 97, said plate being held on said projections by means] of nuts 108. A I conical rea1ner109 is mounted on each side 7 j of the plate -107 and in actual alignment with "the pipe sectionsj- One of the reamers .109 extendshthrough the opening 46 and into the'casing 33. It willreadily be seen that the pipe section extending through the openm g-46 must be :withdrawn after the threading process befo'rethe reamer can be at-' tachedL.-.After'the reamer is attached to the "casing 33 the shaft 81 is again set in rotation for rotating the casing 33 andthe pipe sec- I tions are moved toward the rotating reamer 1 ,until the ends of'the pipes engage the reamer' disposed in the vise: 5 in the manner herein- 7 I before 'describednand extends throughthe bymeans of the wheels 17 of the vises 5and6 whereby the burs are cut away. After the burs have been removed the pipe sections are then removedffrom the-vises. It will readily be seenthat the reamer'must be removed be- ;fore'another pipe can be inserted inthe deviceforbeing cut and-tl1readed.

The device isalsoadapted formaking nip-I ples Without a nipple chuck in the following manner: The lendof a section of pipe is- "markedfor the length of a nipple which it is desired to make, The section'of pipe is then casing 33, the end thereof being in substantial alignment with the apices 72. 1 The; end is then threaded, assuming of'course thatit has not previously"beenthreaded. The pipe is then moved awayfromthefdie stock .42 so that'it will not engage with thedies 48 and thedie stock 42 is moved ba'ck'to; the position shown-in Figure 2. If it has. been threaded, thenthis operation isunneCessary. The pipe is then m'ovedthrough the die stock until the marked ,portion is. in alignment .with the apices 72 and the .dies are thensetin motion for carrying' oiit the whole. threading operation as hereinbefore set forth. "The .pipe'is then withdrawn fromjthe' die. stock 42 until the deepestthreaded out, whichwould be at the marked portion isin; line .with the cutter 93,;at; which timelthe cutter and the casing 33 are actuated for cutting the threaded nip ple from t-he pipe. It will be seen bysreferring to Figure Q'that bv rotating the'adjusting ring 77 bymeans of an instrument inserted in one ormoreof the openings llO thepins 63 will be moved with respect to the pins 62 for var 'die members Ticlaim'q". 1' r L 1 1. A device of the type described compris ing a supporting table,.apa'irof spaced-apart vise members movably mounted on saidtable, means for locking the vises to thetable, said vises being 7 carriage disposed between the visemembers and in alignment therewith said carriage'being movably mounted on the table and adapt ed for permitting the pipe to, extend therethrough, a casing rotatably-mounted' within the carriage, means connectedwith the casing whereby "said'pipe may be cut at an intermediate point thereof, means wherebysaid carriage may be moved horizontally and'said casing rotated therein simultaneously, a die stock fixedly mounted within said casing and rotatable therewith, die-members carried by said diestock, saiddie members being adapted for providing the-abutting ends of the cut pipe sections with tapered threaded end portions when said carriage is movedsimult a neously with the rotation of the'caslng, means forvarying the depthof cut of the die members, said means comprising aplurality of beveled elements extendingthrough'said die stock and rotatable'therewith, said beveled elements being movable longitudinally' with respect to'the die stock, said diesbeing'in en yingthe depth ofcut of the adapted for gripping'a-pipe', a

gagement with the beveled elements and radially movable with respectto the axis of rotation depending on the direction of movement of the beveled elements, and'lnean's' for'adjustably'positioning the beveled elements. 2. A device of the type described comprising a supporting frameyapair of vise menibers movably mountedson the supporting frame and disposed in spafced apa-rt positions, sald vise members being adapted for gripping a cylindrical. member,=a housingImovably mountedxon the supporting frame and positioned between the vise members, adrum rotatably'mounted in the housing, a cuttingeleme I ment mounted onfthe drum and adapted for cutting the cylindrical member for providing a pair of cylindrical sections, said vise members being adapted for supporting the sec-- tions, and die members mounted in the drum for threading the adjacent ends ,ofthe sections when the drum is rotated.

3. A device of the type described comprising a supporting frame, a pair of vise members movably mounted on the supporting frame andvdisposed in spaced-apart positions, means for holding the vise members in locking engagement with the supporting frame, said vise members being adapted for gripping a cylindrical member, a housing movably mounted on the supportlng frame and positioned between the vise members, a drum rotatably mounted inithe' housing, a cutting element mounted on the drum and adapted forcutting the cylindrical member for providing a pair of cylindrical sections,said vise members being adapted for supporting the sections, a die stock mounted in said drum,

and die members mounted in the die stock for threading the adjacent ends of the section when the drum is rotated. V I I 4.. Adevice of the type described compris inga supporting frame, a'pair of vise mem- V ,bers movably mounted on the supporting tatably mounted in the housing, a cutting element mounted on the drum and adapted for cutting the cylindrical members for providing a pair of cylindrical sections, a die stock mounted in said drum, and die members mounted in the die stock and radially mov able with respect thereto,said ,die members v being adaptedifor providing the cylindrical sections-with tapered threaded end portions 7 when the drum is rotated, I

' 5,-A device of the type'described comprising a supporting frame, a pair of vise mem-v bers movably mounted on the supporting frame and disposed in spaced-apart positions, said vise members being adapted for gripping "a cylindrical member, aflhouslng movably mounted on the supporting frame and positioned between the vise'members,a drum rotatably mounted on'thehousing, a cutting element mounted on the drum and adapted I for cutting a cylindrical member for providing a pair of cylindrical sections, said vise, 7 members being adapted for supporting said provided with longitudinal openings there sections, a die stock mounted on the drum and through, bar members disposed in said open- 'ings and'provided with beveled faces, said die stock being slidable withrespect to the bar members, and diemembers mounted in the die stock and radially movable with respect thereto, said die members being in engagement with the bar members for providing the cylindrical sections with tapered threaded end portions when the drum is rotated.

6. A device of the type described comprising a supporting frame, a pair of vise members movably mounted on the supporting frame and disposed in spaced-apart positions, said vise members being adapted for gripping a cylindrical member, a housing movably mounted on the supporting frame and positioned between the vise members, a drum rotatably mounted on the housing, a cutting element mounted on the drum and adapted for cutting a cylindrical member for providing a pair of cylindrical sections, said vise members being adapted for supporting said sections, a die stock mounted on the drum and provided with longitudinal openings therethrough, bar members disposed in said openings and provided with beveled faces, said die stock being slidable with respect to the bar 1nembers,'diemembers mounted in the die stock and radially movable with respect thereto, said die members being in engagement with the bar members for providing the cylindrical sections with tapered threaded end portions when the drum is rotated, and means for changing the radial position of the bar members with respect to the die stock for varying the depth of the cut of said die members. s

7 p A device of the type described comprising a supporting frame, a pair of vise members movably mounted on the supporting frame and disposed in spaced-apart positions,

said vice members bein adapted for gripping a cylindrical mem er, a housing movably mounted on the supporting frame and positioned between the vise members, a drum rotatably mounted on the housing, a cutting element mounted on the drum and adapted for cutting a cylindrical member for providing a pair of cylindrical sections, said vise members being adapted for'supporting said sections, a die stock mounted in the drum and provided with an axial opening therethrough for receiving a cylindrical member, said die stock being further provided with radially positioned spaced-apart longitudinal passageways therethrough, bar members rotatably mounted on the supporting frame and extending through said passageways, said bar members being rotatable with, and slidable with respect to, said die stock, and die members movably mounted in the die stock and in engagement with the bar members, said bar'members being provided with oppositely beveled faces for varying the radial positions of said die members when the die stock is moved with respect to the bar mem- I bers.

- EDMUND L. AHERN. 

